Primecap Management
CSGP icon

Primecap Management’s CoStar Group CSGP Stock Holding History

Primecap Management’s Portfolio CSGP Stock Details CSGP Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$23.3M Buy
821,600
+18,000
+2% +$619K 0.01% 237
2026
Q1 		$32.4M Buy
803,600
+652,600
+432% +$34M 0.03% 214
2025
Q4 		$10.2M Buy
151,000
+53,000
+54% +$3.75M 0.01% 258
2025
Q3 		$8.27M Buy
98,000
+10,000
+11% +$884K 0.01% 264
2025
Q2 		$7.08M Buy
88,000
+31,500
+56% +$2.45M 0.01% 275
2025
Q1 		$4.48M Buy
+56,500
New +$4.3M ﹤0.01% 283

Other funds holding CSGP

Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
BAMCO Inc
BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
ACM
AKRE Capital Management Middleburg, Virginia $5.12B AUM 19.08% 1-Year Est. Return
Polen Capital Management
Polen Capital Management Boca Raton, Florida $11.6B AUM 8.03% 1-Year Est. Return

Primecap Management's CSGP Position: Q2 2026 in Review

Primecap Management increased its CoStar Group (CSGP) stake by 2.2% in Q2 2026, buying an estimated $619K and bringing the position to 821,600 shares worth $23.3M. The position accounts for 0.01% of the portfolio, ranked #237.

Primecap Management first reported a position in CSGP in Q1 2025 and has held it in 6 quarters since. The position peaked at $32.4M in Q1 2026. 754 funds tracked by Wall St. Rank hold CSGP as of Q2 2026.

  • Primecap Management held 821,600 shares of CoStar Group worth $23.3M as of Q2 2026.
  • Primecap Management bought 18,000 CoStar Group shares in Q2 2026, an estimated $619K.
  • CoStar Group made up 0.01% of Primecap Management's portfolio in Q2 2026, its #237 holding.
  • Primecap Management first reported a position in CoStar Group in Q1 2025 and has held it in 6 quarters since.
  • Primecap Management's CoStar Group position peaked at $32.4M in Q1 2026.
  • 754 funds tracked by Wall St. Rank held CoStar Group as of Q2 2026.

Based on Primecap Management's 13F filing for Q2 2026, filed 14 Aug 2026.